Thill-coupling



(No Model.) Q

G. W. ATKINS.

THILL COUPLING.

No. 435,273. Patented Aug. 26, 1890.

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UNITED STATES PATENT OEEIcE.

GEORGE \V. ATKINS, OF CLARION, PENNSYLVANIA.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 435,2'73, dated. August 26, 1890.

Application filed April 8, 1890. Serial No. 347,062. (No model.)

To all whom it may concern:

Be it known that I, GEORGE W. ATKINS, a citizen of the United States of America, residing at Clarion, in the county of Clarion and State of Pennsylvania, have invented certain new and useful Improvements in Thill-Oouplings, of which the following is a specification.

Myinvention consists in the novel construction of parts, as hereinafter specified, and especially as the same is particularly pointed out in the claims.

I have fully and clearly illustrated my invention in the accompanyingdrawings, where- Figure 1 is a side View showing my improved key as applied to one end of the coupling. Fig. 2 is ahorizontal vertical section. Fig. 3 is a top view. Figs. 4 and 5 are detail views.

A designates the shaft-iron having an eye 1, which fits into the space between the bearing-ears 2 3 of the coupling B, where it is secured in place by the couplingpin 4. The bearing-ear 2 is formed with a small aperture in its side face, substantially as shown in Fig. 2 of the drawings, to admit a small object when it is desired to knock out or remove the bolt. The ear 3 is open to receive the coupling-pin, and is provided on its end with a vertically-arranged tapering and dovetailed groove 5, in which the fastening-key 6 is made to slide. 'lhiskey is made tapering or wedgeshaped, substantially as shown in the drawings, and being formed with bevels 7 8 on its sides to slide in the groove. This key 6 has secured across its center a holding-spring 9, which snaps into the transversely-arranged groove 10, thereby locking the key and preventing it from being jolted out or becoming displaced. To permit the key and lockingspring to be readily inserted, the upper portion of the end face may be beveled, as seen at 11. To withdraw the key, the ends of the spring are raised out of the groove and the key is pushed up in the direction from which it was inserted.

Having thus described my invention, whatI claim, and desire to secure by Letters Patent, is-

1. In a thill-coupling, the combination, with the thill-iron, the bearing-pin, and the coupling-ears, one of which is formed with avertically-arranged dovetailed groove and a trans versely-arranged shallow groove, of the fastening-key formed to fit the vertically-arranged groove in the ear of the coupling, and provided with the transversely-arranged spring, substantially as described.

2. In athill-coupling, the combination, with the thill-iron, the bearing-pin, and the coupling-ears, one of which is formed with a knockout aperture and the other with a verticallyarranged dovetailed groove and a transversely-arranged shallow groove, of the fastening-key formed to fit the vertically-arranged groove in the ear of the coupling, and provided with the transversely-arranged spring, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two attesting witnesses.

GEORGE \V. ATKINS.

Attest:

SAML..K. CLARKE, A. G. MoOoMB. 

